No Mac Coscair households in Griffith's.
| Cosgrave | Very numerous: Ulster, N Leinster & Connacht (ove); elsewhere (ave). A number of different septs (and names): in the South East Ó Coscraigh; in Connacht Ó Coscair; in Ulster Mac Coscraigh, Mac Giolla Coscair, Mac Cosracháin. The general derivation is from coscrach, victorious.MIF & SGG. |
| Mac Coscair | Mac Cusker, Cosgrave, Cosgrove : féach Mac Oscair. |
| MacCosker | rare: Strabane (Tyrone). See Mac Cusker. |
| MacCusker | numerous: Fermanagh, Tyrone and Ulster generally. Ir. Mac Oscair, from first name Oscar, dear-lover, popular amongst the Maguires of Fermanagh to whom this sept were related. GPN, SI. |
Parishes where Mac Coscair and a second surname are found together
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